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The mass-loss rates of red supergiants and the de Jager prescription
The mass-loss rates of red supergiants the de Jager prescription
2011/1/11
Mass loss of red supergiants (RSG) is important for the evolution of massive stars, but is not fully explained. Several empirical prescriptions have been proposed, trying to express the mass-loss rate...
Plasmons and Interband Transitions of Ca$_{11}$Sr$_3$Cu$_{24}$O$_{41}$ investigated by Electron Energy-Loss Spectroscopy
Plasmons and Interb Transitions
2010/11/24
Electron energy-loss spectroscopy studies have been performed in order to get a deeper insight
into the electronic structure and elementary excitations of the two - leg ladder system
Ca11Sr3Cu24O41....
Fuel Efficient Galaxies: Sustaining Star Formation with Stellar Mass Loss
cosmology theory – galaxies evolution – galaxies formation – stars formation – methods
2010/11/11
We examine the importance of secular stellar mass loss for fueling ongoing star formation in disk galaxies during the late stages of their evolution. For a galaxy of a given stellar mass, we calculate...
Nuclear and Non-Ionizing Energy-Loss for Coulomb Scattered Particles from Low Energy up to Relativistic Regime in Space Radiation Environment
Coulomb Scattered Particles Low Energy Relativistic Regime Space Radiation Environment
2011/1/5
In the space environment, instruments onboard of spacecrafts can be affected by displacement damage due to radiation. The differential scattering cross section for screened nucleus–nucleus interaction...
A possible solution to the mass-loss problem in M-type AGB stars
mass-loss problem M-type AGB stars
2010/11/12
Mass loss is a fundamental, observationally well-established feature of AGB stars but many aspects of this process still remain to be understood. To date,self-consistent dynamical models of dust-drive...
The mass-loss rates and molecular abundances of S-type AGB stars
mass-loss rates molecular abundances of S-type AGB stars
2010/11/12
The S-type stars are believed to have a C/O-ratio close to unity (within a few percent). They are considered to represent an intermediate evolutionary stage as AGB stars evolve from oxygen-rich M-type...
Despite the 300% systematic theoretical uncertainty associated with extracting ˆq using current energy loss models due to the collinear approximation, and despite the uncertainties in the initial...
Abundance anomalies in pre-main-sequence stars: Stellar evolution models with mass loss
Diffusion — stars chemically peculiar — stars mass–loss — stars pre–main-sequence — stars evolution — stars
2010/11/12
Aims. The effects of atomic diffusion on internal and surface abundances of A and F pre–main-sequence stars with mass loss are studied in order to determine at what age the effects materialize, as wel...
Spatial, temporal, and vertical variability of polar stratospheric ozone loss in the Arctic winters 2004/2005–2009/2010
polar stratospheric ozone the Arctic winters
2010/10/21
The polar stratospheric ozone loss during the Arctic winters 2004/2005–2009/2010 is investigated by using high resolution simulations from the chemical transport model Mimosa-Chim and observations fro...
Mass loss rates inferred from mid-IR color excesses of LMC and SMC O stars
Solar and Stellar Astrophysics (astro-ph.SR) Galaxy Astrophysics (astro-ph.GA)
2011/1/6
We use a combination of VJHK and Spitzer} [3.6], [5.8] and [8.0] photometry, to determine IR excesses in a sample of LMC and SMC O stars.
Observing and modeling the dynamic atmosphere of the low mass-loss C-star R Sculptoris at high angular resolution
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
We study the circumstellar environment of the carbon-rich star R Scl using the near- and mid-infrared high spatial resolution observations from the ESO-VLTI instruments VINCI and MIDI. These observati...
Be stars are thought to be fast rotating stars surrounded by an equatorial disc. The formation, structure and evolution of the disc are still not well understood. In the frame of single star models, i...
Improved Loss-Tolerant Quantum Coin Flipping
Improved Loss-Tolerant Quantum Coin Flipping
2010/10/18
In this paper, we present a loss-tolerant quantum strong coin flipping protocol with bias
" 0:359. This is an improvement over Berlin et al. ’s protocol [BBBG08] which achieves a bias of 0:4. To ac...
On the Existence of Loss-Tolerant Quantum Oblivious Transfer Protocols
Existence Loss-Tolerant Quantum Oblivious Transfer Protocols
2010/10/20
Oblivious Transfer is the cryptographic primitive where Alice sends one of two bits to Bob but is oblivious to the bit received. Using quantum communication we can build oblivious transfer protocols w...
Estimation of a probability in inverse binomial sampling under normalized linear-linear and inverse-linear loss
Sequential estimation Point estimator Inverse binomial sampling
2010/12/3
Sequential estimation of the success probability p in inverse binomial sam-pling is considered in this paper. For any estimator ˆp, its quality is measured by the risk associated with normalized ...